Different types of substation

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Scope and content of Wiki EIG
General rules of electrical installation design
Connection to the MV utility distribution network
Connection to the LV utility distribution network
MV & LV architecture selection guide
LV Distribution
Protection against electric shocks
Sizing and protection of conductors
LV switchgear: functions & selection
Protection against voltage surges in LV
Energy Efficiency in electrical distribution
Power factor correction and harmonic filtering
Power harmonics management
Characteristics of particular sources and loads
PhotoVoltaic (PV) installation
Residential electrical installations
ElectroMagnetic Compatibility (EMC)


Substations may be classified according to metering arrangements (MV or LV) and type of supply (overhead line or underground cable).
The substations may be installed:

  • Either indoors in room specially built for the purpose, within a building, or
  • An outdoor installation which could be :

  - Installed in a dedicated enclosure prefabricated or not, with indoor equipment (switchgear and transformer)
  - Ground mounted with outdoor equipment (switchgear and transformers)
  - Pole mounted with dedicated outdoor equipment (swithgear and transformers)
Prefabricated substations provide a particularly simple, rapid and competitive choice.


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